Pinpoint Test RH: REDUCTANT Heater: Introduction

WARNING: This page is about a different car, the 2013 Ford F-550 Super Duty, 2013 Ford F-450 Super Duty, 2013 Ford F-350 Super Duty, and 2013 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Regeneration may occur during normal operation. During regeneration, diagnostic procedures may display biased values. If a regeneration occurs during diagnostic procedures, allow the process to complete before continuing diagnostics.

This pinpoint test is intended to diagnose the following:

reductant heaters
harness circuits: RDHTRC1, RDHTRC2, and RDHTRPWR
glow plug control module GPCM

Fig 1: Identifying Reductant Heater And Sender Assembly Connector
Courtesy of FORD MOTOR CO.

Fig 2: Identifying Reductant Pump Assembly Connector
Courtesy of FORD MOTOR CO.

Fig 3: Identifying Reductant Pressure Line Heater Assembly Connector

Courtesy of FORD MOTOR CO.

Fig 4: Identifying Reductant Heater Relay Connector

Courtesy of FORD MOTOR CO.

Fig 5: Identifying Glow Plug Control Module-C (GPCM-C) Connector

Courtesy of FORD MOTOR CO.